Variable-speed mechanism.



No. 840.669. EATENTEDJA'N. 8,-190'7.

' -L.' THIEL.

VARIABLE SPEED MECHANISM.

APPLIOATION FILED JULY 17. 1906.

2 SHEETS-SHEET 1.

gnuen'ioz Witnesses PATENTED JAN. 8, 1907. L. THIBL.

VARIABLE SPEED MECHANISM. -APPLIOATION PILED'JULYN, 190s.

QSHEETS-SHEET 2.

S rwenfoz hkloineqk Louis THIEL, OF'GINCINNATI I rotate in a'practically dust-proof box. -To accomplish this result, it is requisite that the TED STATES PATENT OFFICE.

INGMACHINE COMPANY, or CINCINNATI, 01110. A CORPORATION.

VARIABLE SPEED MECHANISM- TO all whom it may concern.-

Be it known that I, LOUIS THIEL, a citizen of the United States, residing at Cincinnati,

in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Variable-Speed l \lechanism,' of which the following is a specification."

My invention relates. to a variable-speed mechanism and box therefor,

. primarily adapted'to be used in connection withmachine-tools, such as a n1illing-machine, but also applicable to other uses employing mechanism of this type. a y In machine tools in particular it is highly desirable that. the variable speed gearing cone of gear-wheels and a tumbler with its gear-wheels adapted to slide longitudinally and to rock radially relative to the cone, so as to throw into train the driving and driven shafts through the intermeshing of gears of selected ratio. In the specific arrangement of this general cone and tumbler system which I have devised there is one shaft adapted-t'o be rocked to accomplish'the sliding movement" and another shaft adapted to be rocked to accomplish the swinging movement of the tumbler mechanism.

r :The features of my invention will be more fully set forth in the description of the accompanying" drawings, forming a part of this specification, in which Figure l is a front elevation of my inn proved speed-box applied to a milling-mm chine. Fig; 2 is' a sideelevation thereof.

Fig. 3 is an enlarged section'on line w an, Figg 2.'\F ig. 4 is a-sectio'n on line '20 w, Fig. 3. Fig. 5 is a section'on line '0 1), Fig. 3. Fig. 6

is asection on line 2, Fig. 3. Fig. 7 is asection on line a a, Fig. 5. Fig. 8 illustrates the general organization of the shafts'and' gearing.

be hereinafter named.

represents the="driving-shaft. suitably Specification of Letters Patent.' Application filed July 17,1906. Serial No. 326.610.

.vided with a detent m'echan'ism 22 toeng the segmentally-arranged orifices 23 of plate -3() intermeshing with the 1 represents the box inclosing the partst Patented Jan. 8,1907.

jburn-aled in the box and having-thereon the driving-wheel 3. (See also Fig. 6.)- This wheel *3 is shown as asprocl'ret-wheel. On-

this shaft 2 is mounted.a sleeve 4,"(se'e Fig. 6,) adapted to turn with and slide on shaft2, said sleeve being provided with two gearwheels of different diameter 5 '6, respectively.

; onto, Assienon TO THE CINCINNATI Mini;-

7 represents a second shaft'journaled in the box, which for convenience I .will call a cone-shaft... -On shaft 7 is fixed a gearwheel 8, havinganelongated sleeve Qyupon which sleeve are fixed the successive gearwheels of the cone-10 ll '12 13 l.4,.respec-;, 'tively.

Also fixed uponishaft' 7 is a sleeve 15, hav1ng cut thereon the gear-wheels 16.17,

and 18 is the gear-wheel fixed on, sleeve The sleeve 4 may be slid-so as to engage the gear-Wheel 6 with the cone gear-wheel 14 for one rate of drive and so as to intermesh the gear-wheel .5 with the gear-Wheel18for another change of speed to the cone. To

- slide sleeve 4, I journalastud-shaft 19in the wall of the casing-and provide-ansindexeplate 20; Shaft 19 has a crank-handle 21; pro age 20'. On the inner end of shaft19 is an arm through which this fork 25 projects, the-'in-. ner end of the fork straddling the gear-wheel 5,,so as to shift the sleeve l to its different positions...

In order to utilize the shifting-of sleeve 4 24, having a fork 25 'swiveled in it's outer'end.

The'box 1- is provided with an opening 26,

to give another change of speed to the coneshaft 7, I rovidethe stud-shaft '27, upon which are xed two gear-Wheels of different diameter 28 29, respectively, adapted-top rotate together. Gear-wheel 28 intermeshes wlth the pinion 30. on a stud shaft3'l, pinion gear wheel 15 on the cone-shaft 7, so that if sleeve :4 be

shifted still farther to the left, so as to .dis- 1 engage gear-wheel 5 from gear-wheel,l8, gear 5 will be intermeshed with gear-wheel 29, and a third change of speed will be 1mparted from shaft 2 to the cone-shaft 7 .e' i

34 represents a pinion held by the tumbler mechanism, adapted toturn with 'and' ,sl1de on the driven shai t 32.''- Pinion 3 4'1 s 1nter 32 represents a driven shaft journaled the box, upon which is moun'teda tumblerfork 33, adapted to. slide and rockon shaft 32.

gag

meshed with the-geaii-wheel 35,'fixed upon a stud-shaft 86, journaled inthe'outer end of the tumblereforks, as shown iniFig. 4.

.As thetumbler mechanism is slid on shaft 32 and rocked thereomthe tumbling gear wheel 35 maybe selectively intermeshed with the gear-wheels 17 8 10,11 l2 13 14 of V the co'ne-shaft 7; 1

- The-mechanism for rocking the tumbler 33 is. shownfin Figs. 3, 5, and 7 37 represents a rock-shaft journaled in the I walls of-the box 1.-.

an annular groove 42; On sleeve 38 is a seg-' 38 represents a sleeve fixed to turn with and; slide gon rock-shaft 37. Said sleeve 38 is "formedwith the segmental teeth 39, intermeshing with the segmental teeth 40, formed on the tumbler-33: The tumbler 33 is also provided *With: an extension 41, formed With mental collar 44, engaging in the annular roove 42 constantly as'the shaft 37. isrocked;

r heft 37 'is; )ro-vided With a handle 45, 'in' the outer'end 0 which is a detent mechanism 46, engaging Withthe segmentally-arranged orifices 47 on the end portion ofthe box 1.- The positions of these segmental orifices 47rep resent-the difi'erent vertical steps of the cone andthe-relative'position of the tumbling gear- I Wheel 35-to selectively intermesh with the diflerent diameter gear wheels of the cone. 48 represents a rock-shaft journaled in the I bottom of the box 1 having an arm 49, carr ving on itsmovmg end an engaging plate 50, which engagesin the endofthe' groove 42 of the tumbler mechanism. The front end of rock-shaft-Ai is provided with a cranlehandle 51, having-a detent mechanism 52, engaging withthe segmentally-arranged orifice 53 of the index-plate 20. The orifices 53 represent the different lateral positions of adjustment of the tumbler relative to the steps of I the cone.

-'From this description it Will be understood that by manipulating the lever 21 three 'different rates of drive may be imparted to the cone-shaft? 5 By'manipulating the lever 51 the tumbler mechanism andthe segmental rocking mechanism on shaft 37.1nay be ad- I justed laterally on shaft 32 and 37 to bring the tumbling gear-wheel 'laterally opposite any selected gear-Wheel of: the cone, and then manipulating the lever the tumbler :mechanism may be rocked to intermesh tumbling gear-wheel 35 with the selectedgear-wheel of the cone.

'It will thus be seen that I have provided for quite a Wide range-of changes in a very compact gear-box and that the manipulatinglevers forshifting the engaging and disengaging gear-Wheels are conveniently arranged so as to operate rock-shafts 1ournaled 1n the gear-box, and the rock-shafts are connected to the shifting gear elements interior of the box.

- Having described my invention, I claim- 1. In a variable-speed device an inclosing box, a cone and tumbler gear-wheel system suitably mounted therein, a rock-shaft j ournaled in the box, a segmental gear mounted to box, a cone and tumbler gear system suitably mounted therein, a driving-shaft also mounted in said box, slid ng gears of difi'erent diameter on the slidmgshaft adapted to be selectively intermeshed with difierent i'n'embers' of the cone ofgears, a rock-shaft and mechani'sm for sliding thesaid' gears onthe sliding shaft,a second rock-shaft j ournaled in the box,

- I a segmental gear mounted to turn with and slide on the rock-shaft the tumbler having a segmental gear'engaging with the segmental gear of the rock-shaft, a manipulating indexing-lever for. the second rock shaft, and a third rock-shaft mounted in the-box ad apted to slide the. said segmental gears in unison,

and an indexing-lever for said third rock,- 5

shaft, sub stantially as described.

Intest-nnony' whereof have hereunto set my hand.

' LOUIS THIEL.

VVitnesses:

OLIVER B. KAIsER,.

LEO ODONNEL 

